Anchored retaining walls consist of earth anchors that are driven back into the residual soil to a depth past the failure surface of a slope. Anchors are driven into the earth by heavy equipment. Anchors driven into the terrain underneath the retaining wall are expanded mechanically or by using high-pressure concrete. This complex method is used when large surcharge is expected above the retaining wall. Anchored walls require thinner wall materials as slimmer interlocking concrete bricks are supported by steel anchors that hold large loads.